Felix P., Moulin M., Munier B., Portmann J. // IEEE Transaction on Electron Devices. 1980. <...> Krishnamurthy S., Berding M. A., Robinson H., Sher A. // Journal of Electronic Materials. 2006. <...> Infrared focal plane arrays based on systems of photodiodedirect injection readout circuits D. D. Karnaushenko, I. I. Lee, V. G. Polovinkin Institute of Semiconductor Physics. <...> NAS Ukraine 41 Nauka av., Kiev, 03028, Ukraine E-mail: gumenjuk@isp.kiev.ua A mathematical model for multi-element IR FRA based on the system ‘photodiode-direct injection readout circuits’ is reported. <...> With the model, an analysis of IR FRA can be performed with current-voltage characteristics of the photodiodes set either in analytical form or as an approximation of experimental current-voltage curves. <...> The model enables identification of factors that limit the performance characteristics of multi-element IR FPA, and IR thermography systems designed around such IR FPA, versus electrical and design parameters of the photodiodes, readout circuits, and background environment. <...> PACS: 85.60.-q Keywords: Hg1-xCdxTe, photodiode, multi-element photodetector, direct injection readout circuit, thermal imaging system. <...> Представлена математическая модель миогоэлементпых инфракрасных фотоприемиых устройств на основе системы фотодиод нрячоннжекционное устройство считывания.! <...>